La Roche-Posay 10% Pure Vitamin C Anti-Aging Face Serum
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Formulation Summary
A 10% L-ascorbic acid serum from the dermatologist-recommended brand La Roche-Posay. The formula combines vitamin C with salicylic acid for mild exfoliation, two forms of hyaluronic acid for hydration, and the brand's proprietary Neurosensine peptide for soothing. The silicone-based vehicle provides a smooth application. Contains denatured alcohol at a notable concentration and synthetic fragrance.
La Roche-Posay takes a multi-active approach with this serum. The 10% L-ascorbic acid provides core antioxidant and brightening activity at a moderate concentration. Salicylic acid adds BHA exfoliation, which is unusual in a vitamin C serum and may benefit oily or acne-prone skin. Two forms of hyaluronic acid (sodium hyaluronate and hydrolyzed hyaluronic acid) provide multi-depth hydration. Neurosensine (Diacetyl Dipeptide-1 Cetyl Esters) is the brand's proprietary soothing peptide. The formula uses a silicone base (cyclohexasiloxane, dimethicone) for texture and denatured alcohol for quick absorption. Fragrance is added.
Quick Facts
Designed For
- •Those who trust dermatologist-recommended brands
- •Users with oily or combination skin who benefit from salicylic acid
- •People seeking a moderate vitamin C concentration (10% vs. 15-20%)
- •Those who want hyaluronic acid hydration alongside vitamin C
- •Users looking for a multi-active anti-aging serum
May Not Suit
- •Users with dry or sensitive skin (denatured alcohol can be drying and irritating)
- •Those who avoid fragrance in skincare
- •Vegan or cruelty-free shoppers
- •People seeking a high-concentration vitamin C treatment (10% is moderate)
- •Users sensitive to salicylic acid (the combination with vitamin C increases exfoliation)
Key Ingredients
| Ingredient | Concentration | Function |
|---|---|---|
| Ascorbic Acid (L-Ascorbic Acid) | 10%brand-confirmed | Pure vitamin C at a moderate concentration. Research supports 10% as effective for brightening and antioxidant protection. Lower irritation risk than 15-20% formulations. |
| Salicylic Acid | — | BHA exfoliant listed near the end of the ingredient list. At a low concentration, it provides mild exfoliation and pore-clearing benefits. Unusual in a vitamin C serum and differentiates this from standard formulations. |
| Neurosensine (Diacetyl Dipeptide-1 Cetyl Esters) | — | La Roche-Posay's proprietary soothing peptide. Designed to calm skin sensitivity and reduce discomfort from active ingredients. Helps buffer the vitamin C and salicylic acid. |
| Sodium Hyaluronate / Hydrolyzed Hyaluronic Acid | — | Two forms of hyaluronic acid. Standard sodium hyaluronate hydrates the surface; hydrolyzed form has smaller molecules for deeper penetration. |
The Formulation Explained
Alcohol in a vitamin C serum
Denatured alcohol is listed fifth in this formula. It helps the serum absorb quickly and creates the lightweight, matte finish. However, alcohol denat. can strip skin lipids and compromise the barrier with daily use. This is a trade-off between cosmetic elegance and skin health. Users with dry or compromised barriers should consider this carefully.
Vitamin C plus salicylic acid
Combining L-ascorbic acid with salicylic acid is unusual. Both are acidic ingredients that require low pH for activity. The salicylic acid adds BHA exfoliation, which can help oily and acne-prone skin. However, layering two acids increases the risk of over-exfoliation and irritation for sensitive skin types.
Neurosensine soothing peptide
La Roche-Posay includes their proprietary Neurosensine peptide to counterbalance the active acids and alcohol. This is a thoughtful addition given the formula's irritation potential. The peptide calms sensory nerve endings in the skin, reducing the perception of discomfort.
Dermatologist brand positioning
La Roche-Posay is one of the most recommended dermatologist brands globally. However, this particular formula contains denatured alcohol and fragrance, which many dermatologists would flag as unnecessary irritants. The brand's reputation may set expectations for sensitivity-friendly formulations that this product does not fully meet.
Ingredients to Know
Denatured alcohol listed fifth, indicating a significant concentration. Helps the serum dry quickly and absorb into skin. Can cause dryness, irritation, and barrier disruption with regular use. A common concern raised by dermatologists and reviewers.
Volatile cyclic silicone. Evaporates after application, leaving a smooth feel. Some consumers avoid cyclic silicones due to environmental persistence concerns.
Synthetic fragrance. Listed at the end but present in a formula already containing active acids. Adds irritation risk for sensitive skin.
Anti-aging ingredient that supports collagen production and has anti-inflammatory properties. Research supports its use at low concentrations.
User Feedback Patterns
Full INCI List
28 ingredients · Click "Show full list" to view
About La Roche-Posay
Full INCI lists are provided on packaging and retailer pages. The 10% ascorbic acid concentration is confirmed. The brand does not disclose concentrations for other actives like salicylic acid or neurosensine. Note: the product may be marketed as '12% Pure Vitamin C' in some regional formulations.
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Sources
- • https://www.laroche-posay.us/our-products/face/face-serum/10-pure-vitamin-c-serum.html
- • https://incidecoder.com/products/la-roche-posay-pure-vitamin-c10
- • https://skinsort.com/products/la-roche-posay/10-pure-vitamin-c-serum
- • https://www.ulta.com/p/12-pure-vitamin-c-anti-aging-face-serum-pimprod2012322
- • https://www.noteddermatology.com/blog/laroche-posay-vitaminc-serum-dermatologists-review
Last updated: 2026-03
Rating Scales
Comedogenicity (0-5)
Likelihood of clogging pores. 0 = won't clog, 1-2 = low, 3 = moderate, 4-5 = high.
Irritancy (0-5)
Potential for skin irritation. 0 = non-irritating, 1-2 = low, 3 = moderate, 4-5 = high.
Ratings based on published ingredient studies. Individual reactions may vary.